serial: sh-sci: Switch to generic DMA residue handling
Convert the SCI driver from the SHDMAE-specific partial DMA transfer
handling to the generic dmaengine residual data framework.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
index 294b283..049036d 100644
--- a/drivers/tty/serial/sh-sci.c
+++ b/drivers/tty/serial/sh-sci.c
@@ -1438,6 +1438,8 @@
struct sci_port *s = container_of(work, struct sci_port, work_rx);
struct uart_port *port = &s->port;
struct dma_async_tx_descriptor *desc;
+ struct dma_tx_state state;
+ enum dma_status status;
int new;
if (s->active_rx == s->cookie_rx[0]) {
@@ -1451,21 +1453,21 @@
}
desc = s->desc_rx[new];
- if (dma_async_is_tx_complete(s->chan_rx, s->active_rx, NULL, NULL) !=
- DMA_COMPLETE) {
+ status = dmaengine_tx_status(s->chan_rx, s->active_rx, &state);
+ if (status != DMA_COMPLETE) {
/* Handle incomplete DMA receive */
struct dma_chan *chan = s->chan_rx;
- struct shdma_desc *sh_desc = container_of(desc,
- struct shdma_desc, async_tx);
unsigned long flags;
+ unsigned int read;
int count;
dmaengine_terminate_all(chan);
- dev_dbg(port->dev, "Read %zu bytes with cookie %d\n",
- sh_desc->partial, sh_desc->cookie);
+ read = sg_dma_len(&s->sg_rx[new]) - state.residue;
+ dev_dbg(port->dev, "Read %u bytes with cookie %d\n", read,
+ s->active_rx);
spin_lock_irqsave(&port->lock, flags);
- count = sci_dma_rx_push(s, sh_desc->partial);
+ count = sci_dma_rx_push(s, read);
spin_unlock_irqrestore(&port->lock, flags);
if (count)